package com.atguigu.eduService.listener;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.alibaba.excel.metadata.CellData;
import com.alibaba.excel.util.ConverterUtils;
import com.atguigu.eduService.entity.EduSubject;
import com.atguigu.eduService.entity.excel.SubjectData;
import com.atguigu.eduService.service.EduSubjectService;
import com.atguigu.servicebase.exceptionhandler.GuliException;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;

import java.util.Map;

/**
 * @author: 亚当
 * @date: 2022年06月23日 14:47
 * @package: com.atguigu.eduService.listener
 * @Description: TODO
 */
public class SubjectExcelListener extends AnalysisEventListener<SubjectData> {

    //因为SubjectExcelListener不能交给spring管理，需要自己new，不能注入其他对象
    //不能实现数据库操作
    public EduSubjectService subjectService;

    public SubjectExcelListener() {
    }

    public SubjectExcelListener(EduSubjectService subjectService) {
        this.subjectService = subjectService;
    }
    //读取Excel内容，一行一行读取
    @Override
    public void invoke(SubjectData subjectData, AnalysisContext analysisContext) {
        System.out.println("######"+subjectData+"###############");
        if(subjectData ==null){
            throw new GuliException(20001,"文件数据为空");
        }
        //一行一行读取的，每次读取都是两个值，第一个值一级分类，第二个值二级分类
        //判断一级分类是否侧重复
        EduSubject existOneSubject = this.existOneSubject(subjectService, subjectData.getOneSubjectName());
        if(existOneSubject==null){ //没有相同一级分类，添加
            existOneSubject = new EduSubject();
            existOneSubject.setParentId("0");
            existOneSubject.setTitle(subjectData.getOneSubjectName());
            subjectService.save(existOneSubject);
        }
        String pid=existOneSubject.getId();
        //添加二级分类
        //判断二级分类是否侧重复
        EduSubject existOTwoSubject = this.existOTwoSubject(subjectService, subjectData.getTwoSubjectName(), pid);
        if (existOTwoSubject ==null){
            existOTwoSubject = new EduSubject();
            existOTwoSubject.setParentId(pid);
            existOTwoSubject.setTitle(subjectData.getTwoSubjectName());
            subjectService.save(existOTwoSubject);
        }
    }
    //判断一级分类不能重复添加
    private EduSubject existOneSubject(EduSubjectService subjectService,String name){
        QueryWrapper<EduSubject> wrapper=new QueryWrapper<>();
        wrapper.eq("title",name);
        wrapper.eq("parent_id","0");
        EduSubject oneSubject = subjectService.getOne(wrapper);
        return oneSubject;
    }
    //判断二级分类不能重复添加
    private EduSubject existOTwoSubject(EduSubjectService subjectService,String name,String pid){
        QueryWrapper<EduSubject> wrapper=new QueryWrapper<>();
        wrapper.eq("title",name);
        wrapper.eq("parent_id",pid);
        EduSubject twoSubject = subjectService.getOne(wrapper);
        return twoSubject;
    }
    public void invokeHead(Map<Integer, CellData> headMap, AnalysisContext context) {
        this.invokeHeadMap(ConverterUtils.convertToStringMap(headMap, context), context);
    }
    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {

    }
}
